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UR7HCTS2-U860-DR 데이터시트 PDF




Semtech Corporation에서 제조한 전자 부품 UR7HCTS2-U860-DR은 전자 산업 및 응용 분야에서
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PDF 형식의 UR7HCTS2-U860-DR 자료 제공

부품번호 UR7HCTS2-U860-DR 기능
기능 High-Performance USB Touch Screen Controller / Digitizer
제조업체 Semtech Corporation
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UR7HCTS2-U860-DR 데이터시트, 핀배열, 회로
ScreenCoderTM UR7HCTS2-U860
High-Performance USB
Touch Screen Controller / Digitizer
HID & SYSTEM MANAGEMENT PRODUCTS, MOUSECODERTM FAMILY
DESCRIPTION
The ScreenCoderTM USB IC is the
first single IC that seamlessly
interfaces ANY 4- or 8-wire
resistive touch screen to a USB-
equipped system. It is also the
first touch screen controller IC on
the market designed to
accommodate a very wide range of
size, capacitance and resistance of
4- or 8-wire touch screens,
providing a universal performance
solution among different OEM
products and touch screen
vendors. This unique feature of the
IC provides OEMs with a wide
variety of interchangeable touch
screen options.
Unlike digitizers, the
ScreenCoderTM USB integrates a
digitizer with a controller that
performs all touch detection, noise
filtering, error elimination and
provides the host with processed
and stable positioning data over
USB. Semtech’s unique motion
algorithms provide high resistance
to RF and other noise sources
resulting in precise, non-jittery
cursor control.
Ideal application for the
ScreenCoderTM USB include
portable devices, interactive kiosks
and industrial / custom displays
with integrated touch screens.
The universal features of the
ScreenCoderTM USB, as
implemented in both the system
and the sensor interface, reduce
the development effort and cost of
touch input based systems. The
ScreenCoderTM USB is available in
a slim, 36-pin SSOP package.
FEATURES
• Controller & digitizer in a single IC
• Interfaces the system via USB
• Works with ANY 4- or 8-wire
resistive touch screen regardless
of size, material or vendor
• Provides high resolution - 1000
points per axis, enabling IC to
make precise drawing and
signature captures
• Accurate, quick touch response
due to Semtech’s advanced
sampling technology and
algorithms
• Highly resistant to RF and other
noise
• No digitizer or external A/D
necessary
• Fully compliant with USB HID
specifications; works with native
USB drivers including Windows®
98, Me and 2000
• Convienent calibration applet
offered free of charge
• Uses slim 36-pin, SSOP package
• Customized versions available
APPLICATIONS
• Handhelds/Notebooks
• Portable Devices
PIN ASSIGNMENTS
• Interactive Kiosks
• Industrial/Custom Touch Screens
1
RSVD1
RSVD2
RSVD3
SXL
SYT
SYB
SXR
RSVD4
RSVD5
RSVD6
RSVD7
VREF
_RESET
VSS2
VDD
OSCIN
_OSCOUT
VSS
18
36-pin SSOP
36
D+
D-
_RB
RSVD13
XR2
YB2
YT2
XL2
RSVD12
RSVD11
USBV
RSVD10
RSVD9
RSVD8
XL1
YT1
YB1
XR1
19
ScreenCoder, MouseCoder are trademarks of
Semtech Corp. All other trademarks belong to
their respective companies.
Copyright Semtech 2000-2001
DOC7-TS2-U860-DS-101
1
www.semtech.com




UR7HCTS2-U860-DR pdf, 반도체, 판매, 대치품
TOUCH SCREEN SENSOR INTERFACE
The ScreenCoderTM USB can acquire data from any 4- or 8-wire resistive touch screen sensors. The sensor
interface has the following features:
Touch detection
The IC periodically checks touch pressure applied to the panel. If there is no touch, the IC will not perform
measurements and will not send data to system. When touch pressure is detected, the IC further qualifies and
determines the amount of pressure. Semtech’s proprietary, patent-pending touch detection algorithm performs this
test very quickly, accommodating sensors with various plate-to-plate capacitances.
Touch Measurement
Position information is only collected if it has been determined that the touch pressure is sufficient for an accurate
reading. To obtain position information from the Resistive Touch Screen Sensor, the ScreenCoderTM USB uses four
internal drivers (two pins for each driver) and four sense lines. During sampling, the drivers of the X-axis are
activated by setting one X-drive high and the other X-drive low. The drivers for Y-axis are set floating. This action
produces a voltage gradient across the touch screen's surface in the X direction. The internal A/D measures both
the voltage across the activated X-plane and the voltage potential between the planes. Next, the drivers for the Y-
axis are activated while the drivers for X-axis are set floating. Again, the internal A/D measures both voltage across
the activated plane and potential between the planes. The X and Y absolute position is obtained from these four
A/D measurements. The IC keeps measuring the touch pressure even while the positioning data is acquired. If
insufficient touch pressure is detected during sampling of the position, the current data set will be rejected.
Touch algorithm
Due to vibration and electrical noise, the raw data can not be used directly. Internal data processing delivers
consistent position accuracy and quick touch response.
Resolution
The ScreenCoderTM USB uses a built-in A/D converter to get the touch position. The maximum touch screen
resolution is 1000 points per direction. Resolution varies somewhat for different touch screen sensors, due to
voltage droop on connecting wires.
Touch screen from different makers
Operating parameters for the touch screens from different manufacturers vary depending on the size of the sensor,
material it is made from, and mechanical construction. The ScreenCoderTM USB takes these properties into
account, and adjusts automatically for plate-to-plate capacitance, intrinsic plate resistances, etc.
Buttons
The ScreenCoderTM USB implements both left and right buttons, however, there is no physical left button. Left
button press is reported when there is touch pressure on the panel. The left button is released when there is no
pressure on the panel. The right button is a physical button, and can be used individually.
Copyright Semtech 2000-2001
DOC7-TS2-U860-DS-101
4
www.semtech.com

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UR7HCTS2-U860-DR 전자부품, 판매, 대치품
SUGGESTED INTERFACING FOR THE SCREENCODERTM USB UR7HCTS2-U860-DR
Copyright Semtech 2000-2001
DOC7-TS2-U860-DS-101
7
www.semtech.com

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부품번호상세설명 및 기능제조사
UR7HCTS2-U860-DR

High-Performance USB Touch Screen Controller / Digitizer

Semtech Corporation
Semtech Corporation

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